header{
    .content{
        width: 1080px;
        margin: 0 auto;
        padding: 15px 0 32px 0;
    }
    //  logo
    .logo{
        width: 162px;
        height: 54px;
        background: url(../img/icon.png);
        background-size: auto 54px;
        display: block;
        float: left;
    }
    //  右侧的QQ和百度Logo
    ul{
        float: right;
        margin-top: 7px;
        .qq{
            width: 40px;
            height: 40px;
            float: left;
            margin-right: 24px;
            a{
                width: 40px;
                height: 40px;
                background: url(../img/icon.png);
                background-size: auto 54px;
                background-position: 250px 0;
                display: block;
            }
            a:hover{
                background-position: 300px 0;
            }
        }
        .tieba{
            @extend .qq;
            margin: 0;
            a{
                background-position: 150px 0;
            }
            a:hover{
                background-position: 200px 0;
            }
        }
    }
}

.article-container{
    width: 1080px;
    margin: 0 auto;
    //  左侧内容
    .article-col1{
        width: 540px;
        padding: 157px 0;
        float: left;
        //  文字
        .article-line1{
            width: 540px;
            font-size: 42px;
            letter-spacing: 12px;
        }
        .article-line2{
            @extend .article-line1;
            letter-spacing: 8px;
            font-size: 37px;
        }
        //  二维码和下载链接
        .article-line3{
            width: 438px;
            margin-top: 50px;
            //  二维码
            .qrcode{
                width: 144px;
                height: 144px;
                background: url(../img/二维码.png);
                background-size: 144px;
                float: left;
            }
            //  下载链接
            .download-links{
                width: 270px;
                padding: 5px 0;
                float: right;
                a{
                    width: 268px;
                    height: 48px;
                    border: 1px solid rgb(204, 204, 204);
                    display: block;
                    color: #555555;
                    line-height: 48px;
                    text-align: center;
                    font-size: 20px;
                    margin-bottom: 30px;
                    .iphone-icon{
                        width: 20px;
                        height: 23px;
                        margin-right: 8px;
                        background: url(../img/icon.png);
                        background-size: auto 54px;
                        background-position: 100px 0;
                        display: inline-block;
                    }
                    .android-icon{
                        @extend .iphone-icon;
                        background-position: 50px 0;
                    }
                }
                a:nth-of-type(2){
                    margin-bottom: 0;
                }
            }
        }
    }
    .article-col2{
        width: 540px;
        height: 630px;
        background: url(../img/手机演示.png);
        background-size: auto 630px;
        background-repeat: no-repeat;
        float: left;
    }
}
footer{
    padding: 44px 0;
    margin-top: 30px;
    text-align: center;
    span{
        color: rgb(178, 178, 178);
        font-size: 12px;
    }
    a{
        @extend span;
    }
    a:hover{
        color: #666666;
    }
}